Silent silencer

arvelok · Post by **arvelok** » July 23rd, 2009, 1:31 pm

What is the most silent one that fit late model steelies?
Trying to piss off as few as possible since offroad riding is illegal here.

yota · Post by **yota** » July 23rd, 2009, 1:49 pm

this is about the quietest thing out there, pretty ugly though.
http://www.thedbsnorkel.com/store/

yota · Post by **yota** » July 23rd, 2009, 1:49 pm

dyno test with it on CR500
http://www.thedbsnorkel.com/dynamometer.php

arvelok · Post by **arvelok** » July 23rd, 2009, 2:18 pm

Too ugly

Is the FMF Q any good?

yota · Post by **yota** » July 23rd, 2009, 3:03 pm

you said "the most silent" not the prettiest

honda02 · Post by **honda02** » July 23rd, 2009, 6:32 pm

So it kinda like a car with turbos on it with drop down it very loud but when you ad full tail pipes it gets a lot almost silent comming out of the tail pipes.

Dirt bike are ment to be noisy Ha Ha.

Try riding a 4 stroke wide open those are loud My CR seem silent now.

NightBiker07 · Post by **NightBiker07** » August 9th, 2009, 9:41 pm

yota wrote:dyno test with it on CR500
http://www.thedbsnorkel.com/dynamometer.php

that thing is an Obamanation....the most liberal, tree hugging democratic thing i have ever seen.

but, if you HAVE to stay quiet, i guess its a useful item.

hoofarted · Post by **hoofarted** » August 10th, 2009, 7:08 am

NightBiker07 wrote: that thing is an Obamanation....the most liberal, tree hugging democratic thing i have ever seen

CR500R7 · Post by **CR500R7** » August 11th, 2009, 2:13 am

Disturbed · Post by **Disturbed** » August 11th, 2009, 6:27 am

Oh the irony.......

People complain about gun noise all the time but silencers on them are a no no but everyone think they're cool and wants one.

People complain about noisy bikes all the time, this look like a good option, but no one want to use one because it looks gay [no insult intended].

Gun guys want em but can't have em, we have em but don't want em.........

CR500R7 · Post by **CR500R7** » August 11th, 2009, 6:34 am

Well if you are trying to kill someone you don't want everyone to hear you shoot them do you.
When I ride my bike I want everyone to here I am on my way so they know to get out of my way so I don't run them over.

hoofarted · Post by **hoofarted** » August 11th, 2009, 8:26 am

dannygraves · Post by **dannygraves** » August 11th, 2009, 10:14 am

the old school answer SA silencer I have on my gen-3 is way quieter that an FMF Q. I'd bet a OEM silencer is too.

hoofarted · Post by **hoofarted** » August 11th, 2009, 11:52 am

dannygraves wrote:the old school answer SA silencer I have on my gen-3 is way quieter that an FMF Q. I'd bet a OEM silencer is too.

no way - i heard it and it wasnt that quiet! But it is quieter than my FMF for sure...

dannygraves · Post by **dannygraves** » August 11th, 2009, 12:34 pm

ya, you heard it echoing inside my garage! Its way quiet, and definitly quieter than the fmf
Q, MFDB has the Q and its not all that quiet.

xtremeslide · Post by **xtremeslide** » August 15th, 2009, 7:16 pm

I had years ago a DOMA silencer and it was really quiet,

compared with FMF powercore 2 or Pro-Circuit 304,DOMA looks like the DEP silencer

so i guess the DEP is quiet too,check here

http://www.deppipes.com/#/honda/cr500r/

ridin4fun · Post by **ridin4fun** » August 18th, 2009, 11:30 am

I know this is old news to most, but carefully repack whatever silencer you choose with quality packing (such as Silent Sport) and pack it loosely. It won't last as long when packed loosely, but it is quieter. And while you're in there, if the silencer is not new, make sure that the perforated stinger is 100% clean. The holes are often clogged from use and most of the noise goes straight out the tip. Every little bit helps. On a similar note, anybody else remember that silencer (from the 80's, I think) that had a tapered outlet and a little spring-loaded disc that shut down the outlet until the throttle was opened? Seems like some version of that would have worked well enough.

hoofarted · Post by **hoofarted** » August 18th, 2009, 11:51 am

ridin4fun wrote:I know this is old news to most, but carefully repack whatever silencer you choose with quality packing (such as Silent Sport) and pack it loosely. It won't last as long when packed loosely, but it is quieter. And while you're in there, if the silencer is not new, make sure that the perforated stinger is 100% clean. The holes are often clogged from use and most of the noise goes straight out the tip. Every little bit helps. On a similar note, anybody else remember that silencer (from the 80's, I think) that had a tapered outlet and a little spring-loaded disc that shut down the outlet until the throttle was opened? Seems like some version of that would have worked well enough.

I believe thats the Super Trapp. Like this?

I dont think it'd work too well with 2-strokes though.

• SuperTrapp exhausts are not recommended for 2 stroke applications.

xtremeslide · Post by **xtremeslide** » August 19th, 2009, 4:45 am

I had it in my old XR

ridin4fun · Post by **ridin4fun** » August 19th, 2009, 8:35 am

While I am a fan of the tuneability of the Super Trapp, no, that's not the one. Someone sold a 2stroke silencer that incorporated an endcap that tapered inward. From the outer edge a rod traveled into the taper and had a flat head on the end (picture a nail pointing out of the center of the silencer with a 90 degree end welded to the endcap at it's opening). Riding freely along the rod was a plastic (composite?) washer lightly forced inward by a weak spring. It was forced into the taper, thereby closing off the exhaust. Under throttle the exhaust pressure would overcome the weak spring and force the disc along the rod out to the open end of the taper. I'm sure it didn't do much at full throttle when your bike is loudest, and you wouldn't want it to. If you've got the throttle pegged on a 500, hopefully you WANT to haul ass, right? But at lesser throttle openings, it seems like this concept could be made to work, especially with the possible option of different spring rates to add/remove some back pressure for lowend, similar to Yamaha's EXUP system, only simpler (and probably less efficient). I'm sure that there was a reason it didn't catch on, but I'd like to know what that reason is. Anyone?

BannedCR500Riders.com

Silent silencer

Silent silencer